I found this historic Pennsylvania Railroad photo recently on My link page Fallen Flags.Org to the right of Your computer screen.

One of the most successful designs of an electric locomotive in North America, was the Pennsylvania Railroad G G 1 class designed by the famous American industrial designer Raymond Lowey during the 1930's. These very solid and well built machines lasted for several decades in service. They served the Pennsylvania Railroad, the succesor company Penn Central, Amtrak, Conrail, and finally New Jersey Transit commuter trains until 1983.

This photo, shows a then nearly 30 year old G G 1 locomotive # 4850 pulling a fast Pennsylvania Railroad passenger train through Trenton New Jersey in January of 1964.